An Outliner tool is a key digital list making aid (even if they all have their limitations). A good Outliner allows you to put making lists ‘on rails’ as Dave Winer put it.
Moving an item up or down, to the top or the bottom. Nesting a thing under another, or deeper still. Moving a nested item up a level of hierarchy. Hide the subitems under a thing, or revealing them. Make a connection with an element elsewhere in an outline or with/in a different outline. Turn lines into bullets into numberings and back. Switch between different types of visualisation, one of which is the outline. All made seamless with keyboard shortcuts.

This is one of the (many) reasons I prefer an outliner-based notes tool like Tana over a notes-based tool like Obsidian.